Revolution counter control



Jan. 2, 1945.

A. B. MACHADO REVOLUTION COUNTER CONTROL 3 Sheets-Sheet 1 Filed Oct. 21, 1941 INVENTOR /4/7//70/7y 5. Mac/7a W/M d ATTORNEY Jan. 2, 1945.

F'I l5 E A. B. MACHADO REVOLUTION COUVANTER CONTROL Filed Oct. 21, 1941 3 Sheets-Sheet 2 INVENTOR Anfhany J1 Mac/Eda 661.

ATTORNEY Jan. 2, 1945. MACHADQ REVOLUTION COUNTER CONTROL Filed Oct. 21, 1941 5 Sheets-Sheet 5 f 44 7a) QZQZMJ ATTORNEY INVENTOR Ari/hm 5/ 5 MJC/kFdO mH m-H-LHHP NE Patented Jan. 2, 1945 REVOLUTION COUNTER CONTROL Anthony B. Machado, Oakland, Calif., assignor to Friden Calculating Machine 00., Inc., a corporation of California Application October 21, 1941, Serial No. 415,878

4 Claims.

This invention relates to calculating machines and is concerned more particularly with the provision of improved means for rendering the revolutions counter eifective or ineffective during operation of the machine.

It is an object of the invention to provide an improved means for selectively preventing operation of the revolutionscounter.

Another object of the invention is to provide a selective control for the counter operation whereby irrespective of the setting of a control which is normally effective to prevent operation of the counter, the counter will be operated during a machine operation such as division, for example.

Other objects and advantages of the invention will be apparent from the following description of a preferred embodiment thereof, as illustrated in the accompanying drawings, in which:

Figure 1 is a side elevational view of a calculating machine embodying the instant invention with the cover removed.

Figure 2 is a sectional elevational view of'a part of the control means shown in Figure 1 but seen from the opposite side thereof.

Figure 3 is a sectional elevational view generally similar to Figure 1 but with certain parts omitted.

Figure 4 is a horizontal sectional view of a portion of the control mechanism taken as indicated by the line 44 in Figure 3.

The invention is shown as embodied in the type of calculating machine shown in the Friden Patent No. 2,229,889, dated January 28, 1941, for Calculating machine."

The calculating machine is provided with the usual shiftable carriage H in which the numeral wheels I2 of the accumulator and I3 of the revolutions counter are mounted in conventional fashion. The carriage includes a rail l4 spaced from the main portion thereof in which one end of each counter numeral wheel shaft is journalled. The accumulator numeral wheels I2 are actuated in the usual fashion and reference is made to said patent for a complete description thereof.

The counter numeral wheels I3 are actuated by the counter actuator I 6 which is operated to perform both a rotary oscillation and an axial reciprocation in timed relation during each cycle, as fully disclosed in said patent. The rotary oscillation is spring driven clockwise about axis I! of the actuator l 6 so that such clockwise movement can be blocked. The counter actuator is driven cyclically in time with the actuating means (not shown) for the accumulator, both the counter actuator and the accumulator actuating means being driven in cyclic fashion by a clutch 2! shown generally in Figure 3. Clutch 2| is controlled by a clutch control lever 22, while the motor drive is enabled by the contacts 23 controlled by a lever system 24 connected to the control lever 22 for simultaneous operation in any convenient fashion.

As seen in Figure 3, the counter actuator I6 is provided with an arm 26 having an ofiset ear 2'! at one end thereof, and means is provided for selectively preventing the spring-urged clockwise rocking movement of the counter actuator to active position in the form of a selectively settable slide 28 suitably mounted for endwise sliding movement in the frame of the machine. Slide 28 has a finger 23 adapted for disposition beneath the ear 2! as shown in Figure 3. Slide 28 is pivotally connected at 3| with a lever 32 pivotally mounted at 33 on a side plate 34 of the frame. Lever 32 i urged in counterclockwise direction by spring 36 attached to the lower end thereof. Lever 32 is also pivotally connected at 31 to one link 38 (Figures 3 and 4) of an expansible linkage including a second link 39. Link 38 is provided witha slot 4| for engagement by a pin 42 on the link 39, and similarly link 39 is provided with a slot 43 for engagement by a pin 44 on the link 38. Link 38 is pivotally connected at 45 to a bellcrank 41 pivoted at 48 on plate 34. Spring 49 tensioned between pin 46 movable with link 39 and pin 44 movable with link 38 provides a spring connection between the links 38 and 39 tending to keep the links in contracted condition.

In order to control the setting of the blocking slide 28 (Figure 3) through the bellcrank 41, the bellcrank is provided with a cam surface 5| for engagement by a pin 52 carried at the lower end of a manual control lever or key 53 pivoted at 54 on the plate 34. Key 53 is yieldably latched in either adjusted position thereof by a spring urged latching arm 56 having a spring 51 associated therewith. As shown, key 53 is in position to cause blocking of thecounter actuator, but upon counterclockwise movement from this position, pin 52 becomes operative to rock bellcrank 41 and through the linkage 38, 39 rock lever 32 in a clockwise direction whereby the blocking finger 29 is moved from beneath the ear 21 and actuations can be performed in the counter. To enable this operation the spring 49 is made strong enough to retain the linkage 38, 39 contracted while the lever 32 is rocked against the tension of spring 36.

In certain machine operations such as division it is necessary to have the counter actuator effective to register quotients irrespective of the set ting of the manual control key 53. During a division process the counter block-out control lever 53 is set in active position so that no registration is effected in the counter during dividend entering operations. However, during the division operation the quotient will be registered irrespective of such setting.

The division mechanism is of the character disclosed in said patent and includes a manually operable starting control key 6| (Figure 2) which is mounted for endwise sliding movement on the auxiliary frame plate 62 by means of slots engaging studs 63 and is spring-urged upwardly by spring 64. At its lower end the key BI is provided with a cam surface for engagement with a roller 65 carried by slide 6'! mounted for endwise sliding movement by respective slots engaging respective studs 68. Upon downward movement of division key 6|, the slide 61 is moved to the left as viewed in Figure 2 against the urgency of spring 69 and roller II carried by slide 61 engages the end of a latch lever I2 (Figure l) which is pivoted at I3 on the auxiliary plate 62 and is spring-urged to active position by spring I4. Latch I2 normally holds a spring-urged division setting member I6 in inoperative position, member I6 being pivoted at "I and being urged in counter-clockwise direction by spring IS. The setting member 16 overlies a roller IT carried by a link 80 (Figures 1 and 2) pivotally connected between a bellcrank "I9 (Figure 2) pivoted at 8i and urged clockwise by spring 82 and a bellcrank 83 pivotally mounted at 84 on an arm 86 pivoted at 81. As fully explained in said patent, the position of arm 86 is controlled during division by the position of the eccentric cam 88.

The downward movement of link 80 (Figure 2) operates through bellcrank IE to move slide 89 to the left in Figure 2 whereby clutch control lever 22 is operated through pin SI and the circuit control is established through pin 92 on the lever system 24.

The clockwise movement of the lever 83 (Figure 2) is utilized to set the machine for division as fully disclosed in said patent and for this purpose the notched end 93 of the lever engages a pin 94 on the usual plus-minus controlling slide 96. Latch pin 31 on lever 83 is also engaged by spring-urged latch lever 98 (Fig. 3) in the con ventional manner to maintain the lever 83 in operative position throughout a division operation.

The division setting lever 83 (Figure 2) also carries a pin IOI underlying an arm I02 secured on a transverse shaft I03. Shaft I03 (Figure 3) also carries a downwardly extending arm I04 operatively engaged with pivot pin 31 between the link 38 and the lever 32. Thus upon counterclockwise movement of arm I02 and shaft I03 in Figure 2 which corresponds to clockwise movement of shaft I03 and arm I04 in Figure 3, the link 38 is moved to the left as viewed in Figure 3, together with the lever 32 which is rocked in a clockwise direction to move its finger 29 from beneath the ear 21. This condition of the parts will obtain during a division operation. Upon release of the division setting lever 83 at the end of a division operation, the lever 32 and the counter block-out slide 28 are returned to active position by the spring 36 provided, of course, that the control key 53 therefor is in its counter block-out controlling position.

In dividend entering operations, for example,

by mechanism of the character shown in the copending application of Carl M. Friden and Anthony B. Machado, Serial No. 315,986, filed January 27, 1940, for Calculating machine, it is desirable to prevent entry of a count in the revolutions counter. To accomplish this result, a bellcrank III (Figure 3) is provided pivoted at I I2 on the frame and having a pin II3 disposed in the forked end of lever 32. When control key 53 is adjusted counterclockwise from the position shown in Figure 3, finger H4, of lever 32 will be disposed in operative relation with pin I [3. Upon clockwise movement of bellcrank III lever 32 will be returned to the position shown in Figure 3 and the linkage 38, 39 will be expanded.

Thus, irrespective of the setting of the control key 53, the counter block-out means is properly controlled in both dividend entering and dividing operations.

I claim:

1. In a calculating machine having an accumulator, a revolutions counter and an actuator therefor, actuator control means including an element settable in either an active or an inactive position for controlling actuation of said counter by said actuator, said means preventing actuation of said counter by said actuator when said element is in active position, means including a manually adjustable member for setting said actuator control means, a plurality of members movable in controlling machine operations involving registrations in said accumulator, means actuated by one of said members for superseding said manually set means and for setting said actuator control means to place said element in active position, and means actuated by another of said members for superseding said manuall set means and for setting said actuator control means to place said element in inactive position.

2. In a calculating machine having an accumulator, a revolutions counter and an actuator therefor, actuator control means settable in two positions and serving in one of said positions to prevent actuation of said counter by said actuator and in the other of said positions to permit actuation of said counter by said actuator, a device adapted to be preset manually for determining the setting of said actuator control means, means intermediate said device and said actuator control means normally effective to set said control means in accordance with the setting of said device, means movable in controlling automatically the entry of a dividend in said accumulator for rendering said intermediate means ineffective and for setting said actuator control means in position to prevent actuation of said counter by said actuator, and means movable in controlling automatically the registration of a quotient in said counter for rendering said intermediate means ineffective and for setting said actuator control means in position to permit actuation of said counter by said actuator.

3. In a calculating machine having a revolutions counter and an actuator therefor, means operative to prevent actuation of said counter by said actuator, resilient means normally effective to render said preventing means operative, and means including a manual control settable to render said preventing means inoperative, and means movable in controlling a calculating operation for rendering said preventing means inoperative during the calculating operation when said manual control is not set to render said preventing means inoperative.

preventing means to enable said control to render said preventing means inoperative, and means movable in controlling a registering operation to positively render said preventing means operative 5 and to cause said connection to yield.

ANTHONY B. MACHADO. 

